Improvement in carriage-jacks



D. R. WIGHT.

Carriage-1acks.

No. 145,922, Patented Dec-23,1873.

Z/IZZLEZMSW I AM, PHDlU-L/THOGEAFHIC F0- IV YMSMRI-IES FRHCESSI UNITED STATES PATENT OFFICE.

DANIEL It. YVIGHT, OF SOUTI-IBRIDGE, MASSACHUSETTS.

IMPROVEMENT lN CARRlAGE-JACKS.

Specification forming part of Letters Patent No. l45,922,:dated December 93, 1873; application filed November 20, 1873.

To all whom it may concern Be it known that I, DANIEL R. WIGHT, of Southbridge, in the'State of Massachusetts, have invented a certain new and useful Improvement in Carriage-Jacks; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing forming a part of this specification, in which- I Figure 1 is a side elevation of my improved carriage-jack. Fig. 2 is a perspective view of the gravitating-pawl.

Like figures and letters refer to like parts in the diiferent figures of the drawing.

My invention relates to that class of carriage-jacks having a pawl and rack operated by a handle or lever; and consists in a novel construction and arrangement of the parts of the same, as hereinafter more fully set forth; the object being to furnish a more compact, cheaper, and more effective device for the purpose than has heretofore been provided. In Fig. 1, K is a foot or bed piece, having the uprights A, on which is disposed the handle or lever B, working on the stud or fulcrum G. D is a lever, jointed to the handle B by the pin E, and provided with the round pawl I, arm M, and gravitating-guardL. G is a sliding bar, working in suitable guides on the upright A, and having the notches represented by the dotted lines :20 x. The long tooth i is to prevent the bar G from accidentally slipping entirely below the pawl I.

The operation of my invention is as follows: The handle B having been elevated to a horizontal position, or higher, and the jack placed in position, the bar G is moved upward until it comes in contact with the axle of the carriage. Now, if the handle B is depressed or forced downward, the lever D will be raised and the pawl I will engage one of the series of teeth on the bar A, or pass into one of the notches x, lifting the bar G, and thus raising the carriage. The guard L not only prevents the lever D from falling down into a horizontal position by coming into contact with the side of the bar G, but operates, by gravitation,

through the arm M, to constantly draw the pawl into the notches, so that when the handle B is depressed or forced down the pawl is sure to act. When the bar G is supported on the pawl I, if the handle B is depressed sufficiently to carry the fulcrum or pin E past or across a perpendicular line drawn through the center of said pin, the upper end of the handle will strike the stop J, which is permanently attached to the standard A, and the jack will thus be locked, the bar G being prevented from sliding downward until the handle is raised again sufficiently to carry the pin E back again or across said'perpendicular line.

Having thus described the device shown in the drawing, what I- claim as of my invention 1s The carriage-jack described, consisting of the standard A, stop J, toothed bar G, handle B, and lever D, provided with the pawl I and gravitatingguard L, all combined substantially as specified.

DANIEL R. WIGHT.

Witnesses E. D. REYNOLDS, O. E. LOMBARD. 

